Blue Sea Systems M-Series Battery Switch Spare Key - Red

The Blue Sea Systems M-Series Battery Switch Spare Key is a replacement for the removable red key used on the M-Series Mini On-Off Battery Switch with Key, PN 6005. If the original key is ever lost, damaged, or you simply want a spare on board, this part replaces it exactly.

Key details

• Red color, matches the original key supplied with PN 6005
• Fits Blue Sea Systems M-Series Mini On-Off Battery Switch with Key (PN 6005)
• Sold individually, so order more than one if you want multiple spares

The key-actuated version of the M-Series Mini switch is a common choice specifically because it adds a layer of security — the boat's main battery circuit can't be turned on without the key present, which matters for theft deterrence or simply keeping curious hands from powering up systems while the boat is unattended at a marina or on a trailer.

Because that security depends on controlling who has a key, it's worth keeping a labeled spare in a separate, secure location rather than leaving it in the boat itself — defeating the purpose of the key switch if a spare is stored somewhere anyone can find it alongside the boat's other gear. This small, inexpensive part is worth ordering proactively rather than waiting until the original key actually goes missing at an inconvenient moment, since a locked-out battery switch with no spare key on hand can leave a boat stranded at the dock or worse, out on the water when it's time to go.